US3518658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital comparison-to-analog signal converter
Assignee: International Business Machines Corp
•
Filing: 1964-12-16
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Granted: 1970-06-30
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Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 Robert J Black
- 👤 Frank J Sordello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/10; G11B21/106; G06; G06J; G06J1/00; H; H03; H03M; H03M1/00; H03M1/12; H03M1/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3211976A
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US3075189A
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US3175138A
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US3248622A
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US3319054A
Cited
US3245073A
Cited
US3267429A
Cited
US3370289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |